biology

Ulmus minor var. italica

Ulmus minor var. italica is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ulmus minor var. italica rather than just read about it. In short: Ulmus minor var. italica was first described by Augustine Henry in 1913, as a 'variety' of field elm from Italy, Spain, Portugal and Algeria. He called it Ulmus nitens var. italica, 'Mediterranean Elm'.

Key takeaways

Ulmus minor var. italica belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ulmus minor var. italica to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ulmus minor var. italica from memory before moving on to harder problems.

Reference excerpt

Ulmus minor var. italica was first described by Augustine Henry in 1913, as a 'variety' of field elm from Italy, Spain, Portugal and Algeria. He called it Ulmus nitens var. italica, 'Mediterranean Elm'. The variety was accepted by Krüssman (1984), despite the wide source-area claimed for it, as a non-clonal cultivar, U. carpinifolia var. italica Henry. Bean (1988), however, considered it "a variety of rather dubious standing", and it was ignored by Richens (1983), who listed instead a "small-leaved U. minor of Spain" and a "narrow-leaved U. minor of northern and central Italy", as well as "the densely hairy leaved U. minor of southern Italy", the latter being Ulmus minor subsp. canescens, formerly Melville's Ulmus canescens.

Description Henry described var. italica as a smooth-leaved field elm growing to 80 feet, distinguished by its 14 to 18 pairs of leaf-veins, an unusually high number for this species. Several Italian field elm authorities offering diagnostic leaf-photographs of local olmo campestre show leaves with 14 to 18 vein-pairs. Henry's description also mentions leathery leaves, conspicuous axil-tufts, and a quarter-inch (about 1 cm) petiole.

Pests and diseases Italian field elm is susceptible to Dutch elm disease and Elm leaf beetle Xanthogalerucella luteola Müll.

Cultivation

Field elm has been described as "a well adapted and appreciated species" in Italy. Henry gave examples of cultivation of var. italica both there and in the wider source-area claimed for it. Of plantings outside the source-area, he mentioned a specimen sent to Kew Gardens, while Krüssman (1984) included a photograph of var. italica Henry planted in Gisselfeld Park, Denmark. There was a tree so labelled in Maastricht in the mid-20th century. The variety was propagated and marketed by the Hillier & Sons nursery, Winchester, Hampshire, in the mid-20th century. E. E. Kemp, curator of Royal Botanic Gardens Edinburgh, noted (1979) that in the Netherlands, "where much nursery stock of smooth-leaved elm is raised, about 75% of the seed is obtained from Italian suppliers".

Notable trees Henry described a number of notable old specimens "of this variety", including one at the Villa Paveri-Fontana, Collecchio, Parma, with a bole 20 feet in girth. A centuries-old field elm, 5.5 metres in girth and possibly an example of Henry's var. italica, survives (2009) in the town of Mergozzo in Piedmont.

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with Ulmus minor var. italica

Start with the simplest possible case. Write down what Ulmus minor var. italica claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ulmus minor var. italica before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ulmus minor var. italica ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ulmus minor var. italica

In research: Ulmus minor var. italica appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Ulmus minor var. italica in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Ulmus minor var. italica is common in secondary-school and first-year university syllabi. It links to neighbouring topics Elm species and varieties, Ulmus, so understanding it makes those chapters shorter.
In everyday life: Look for Ulmus minor var. italica outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ulmus minor var. italica in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ulmus minor var. italica means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Ulmus minor var. italica out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ulmus minor var. italica in simple terms?

Why does Ulmus minor var. italica matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ulmus minor var. italica?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ulmus minor var. italica.